What was found
SHORTLY AFTER T/O WITH ALL ENG A/I SELECTED ON, GOT "ENG 2 A-ICE OFF" ALERT. CONSULTED QRH AND DIVERTED IAW GOC. FOUND DUCT CRACKED AT FLANGE NEAR FWD END. R & R DUCTING 2, ENGINE 2 ANTI-ICE. OPS CHECK GOOD, NO LEAK NOTED AND MESSAGE CLEARED.